import Vue from 'vue'
import Router from 'vue-router'
import Login from './components/Login.vue'
import Home from './components/Home.vue'
import Welcome from './components/Welcome.vue'
import Users from './components/user/Users.vue'

Vue.use(Router)
const router = new Router({
    // 路由重定向到login
    routes: [{ path: '/', redirect: '/login' },
        { path: '/login', component: Login },
        {
            path: '/home',
            component: Home,
            redirect: '/welcome',
            children: [{
                path: '/welcome',
                component: Welcome
            }, { path: '/users', component: Users }]
        }
    ]
})

// 拦截路由导航守卫
router.beforeEach((to, from, next) => {
    // to 将要访问的路径
    // from 代表从哪个路径跳转
    // next 是一个函数， 表示放行
    // next() 放行      next ('/login) 强制跳转
    if (to.path === '/login') return next()
        // 获取token
    const tokenStr = window.sessionStorage.getItem('token')
    if (!tokenStr) return next('/login')
    next()
})
export default router